Gray seals (Halichoerus grypus) are active during the day and primarily sleep at night. They can sleep vertically in the water with their heads raised above the surface or even completely submerged underwater for 20-30 minutes each time.

Domestic goats (Capra hircus) are diurnal animals that are most active in the morning and evening. They will take a short nap during the day, but these ruminant animals usually sleep at night for up to 5 hours in a 24-hour period.

Although they may be the tallest animals on earth, giraffes (Giraffa spp.) have the shortest sleep time compared to any other mammal. Within a 24-hour period, giraffes usually sleep for about 4 hours. Giraffes sleep in short cycles of up to 35 minutes, especially at night, with most daytime sleep averaging only about 5 minutes each.

The translation of the given "Bahasa" text to English while preserving any HTML tags is as follows: Domestic and wild donkeys (Equus asinus) typically sleep about 3 hours per 24-hour period. These animals tend to sleep in groups at night, with individuals taking turns to watch for threats.

In the wild, African elephants (Loxodonta africana) that are very large and majestic only need 2 hours of sleep in a 24-hour cycle. Most elephants sleep at night, although they also take short naps during the day. They are highly social and live in tightly-knit family units, taking turns to sleep to ensure protection from opportunistic nocturnal predators.